The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Sound doesn't travel in space.
255
The earth travels through space at 660,000 miles per hour.
189
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12